Hi, need some help. My s3 has recently having trouble getting started when the engine is cold. Starts first time when warm. Takes a good few turns of the key. There will be nothing at first, then it will get better and want to start but cut out, then it will start and rough idle for a pretty short time, give it a few revs and drive of and it runs great. things to note: it has just got a new oem maf, it has recently got a dp and decat. Any info would be great cheers.